From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Wood Date: Fri, 18 Sep 2009 17:09:39 -0500 Subject: [U-Boot] [PATCH 6/7] ppc/p4080: Handle timebase enabling and frequency reporting In-Reply-To: <1253307595-28655-7-git-send-email-galak@kernel.crashing.org> References: <1253307595-28655-1-git-send-email-galak@kernel.crashing.org> <1253307595-28655-2-git-send-email-galak@kernel.crashing.org> <1253307595-28655-3-git-send-email-galak@kernel.crashing.org> <1253307595-28655-4-git-send-email-galak@kernel.crashing.org> <1253307595-28655-5-git-send-email-galak@kernel.crashing.org> <1253307595-28655-6-git-send-email-galak@kernel.crashing.org> <1253307595-28655-7-git-send-email-galak@kernel.crashing.org> Message-ID: <4AB40523.3070606@freescale.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Kumar Gala wrote: > On CoreNet style platforms the timebase frequency is the bus frequency > defined by 16 (on PQ3 it is divide by 8). Also on the CoreNet platforms > the core not longer controls the enabling of the timebase. We now need > to enable the boot core's timebase via CCSR register writes. > > Signed-off-by: Kumar Gala > --- > cpu/mpc85xx/cpu.c | 4 ++++ > cpu/mpc85xx/cpu_init.c | 12 ++++++++++++ > cpu/mpc85xx/fdt.c | 7 ++++++- > 3 files changed, 22 insertions(+), 1 deletions(-) > > diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c > index bdd9ee4..25c0416 100644 > --- a/cpu/mpc85xx/cpu.c > +++ b/cpu/mpc85xx/cpu.c > @@ -184,7 +184,11 @@ int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[]) > */ > unsigned long get_tbclk (void) > { > +#ifdef CONFIG_FSL_CORENET > + return (gd->bus_clk + 8) / 16; > +#else > return (gd->bus_clk + 4UL)/8UL; > +#endif > } [snip] > +#ifdef CONFIG_FSL_CORENET > + do_fixup_by_prop_u32(blob, "device_type", "cpu", 4, > + "timebase-frequency", bd->bi_busfreq / 16, 1); > +#else > do_fixup_by_prop_u32(blob, "device_type", "cpu", 4, > "timebase-frequency", bd->bi_busfreq / 8, 1); > +#endif We could just use get_tbclk() here and not have to maintain the knowledge in two places. -Scott